Cut the top off the loaf of the bread. Carefully hollow out the bread leaving a one inch shell. In a mixing bowl, beat the cream cheese. Add the sour cream, shred cheese, and worchestershire sauce. Stir in the bacon and green onions. Spoon into the bread shell and put the top piece of the bread back on the loaf. Wrap in tinfoil and bake at 325 degrees for 1 hour or until heated through. Serve warm with crackers.